AU2002224561B2 - Undercut anchor element that can be mounted with positive engagement - Google Patents
Undercut anchor element that can be mounted with positive engagement Download PDFInfo
- Publication number
- AU2002224561B2 AU2002224561B2 AU2002224561A AU2002224561A AU2002224561B2 AU 2002224561 B2 AU2002224561 B2 AU 2002224561B2 AU 2002224561 A AU2002224561 A AU 2002224561A AU 2002224561 A AU2002224561 A AU 2002224561A AU 2002224561 B2 AU2002224561 B2 AU 2002224561B2
- Authority
- AU
- Australia
- Prior art keywords
- base component
- fitting direction
- truncated cone
- anchoring segments
- anchor element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000004873 anchoring Methods 0.000 claims description 47
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000003892 spreading Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 9
- 230000035515 penetration Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
- Joining Of Building Structures In Genera (AREA)
Description
-1- Undercut anchor element which can be fitted with positive engagement The invention relates to an undercut anchor element with an anchor bolt, the elongate cylindrical shank of which is provided on its end which is to the rear in the fitting direction with a fixing head or a nut screwed onto a thread and has on its end which is to the front in the fitting direction a tightening head which widens in the shape of a truncated cone with a radially projecting annular projection provided on its free end, on which there is displaceably mounted a tubular base component which has multiple slots extending from its end which is at the front in the fitting direction and over a part of its length and forms a number of anchoring segments in the slotted region, the said base component having an internal diameter substantially equal to or somewhat greater than the external diameter of the cylindrical shank and having in its outer face a circumferential groove spaced from the end which is at the front in the fitting direction, wherein the said groove causes the end regions of the anchoring segments which are at the front in the fitting direction to be pivotable outwards whilst the material remaining in the base of the groove is deformed in such a way that in the state in which they are inserted into an appertaining fixing bore they are pivoted up by the introduction of a tensional force which displaces the anchor bolt and the base component relative to one another, whereby the anchoring segments taken together have the external shape of two truncated cone surfaces which abut one another with their end faces of smaller diameter and of which the base surfaces formed, on the one hand, on the end which is at the front in the fitting direction and, on the other hand, on the groove when they are not pivoted up each have a diameter which substantially corresponds to or is somewhat smaller than the external diameter of the base component, the truncated cone surface which is at the front in the fitting direction forming a cutting edge.
Such undercut anchor elements, which during fitting in a fixing bore in a substrate are anchored with positive engagement in the bore by penetration of a cutting edge in the wall of the fixing bore, have provoked increasing interest in recent years because they ensure a secure anchoring in the bore and thus fixing of components on a substrate without high radial forces acting on the wall of the bore, as is the case with the so-called spreading dowels which are anchored by frictional engagement in the bore. Because of the high radial spreading AMENDED PAGE -2forces which are necessary for the anchoring by frictional engagement, the use of such spreading dowels is only possible in substrates made from concrete material or also solid stone or rock material which can be subjected to a correspondingly high load, and even with concrete substrates which can be loaded sufficiently it is only possible to provide fixing bores with considerable clearance from the boundary of the respective concrete component in order to ensure that the fixing bore does not break open when the spreading dowel is mounted. On the other hand, anchor elements to be fitted with positive engagement in bores are anchored on undercut surfaces which are larger than the diameter of the actual fixing bore and are produced either separately before the fitting of the anchor element by means of a special undercut drilling tool or in the case of the undercut anchor elements under discussion here are produced from the anchor element itself during fitting by penetration of chisel-like anchoring portions of an anchoring component of the anchor element itself penetrating radially into the wall of the bore. In this case radial forces are produced only in the zone of penetration of the chisel-like anchoring portions into the wall of the bore, i.e. are confined to a small region of the bore and are also relatively low in this region because the chisel-like construction of the anchoring portions allows them to penetrate into the wall of the bore even in the case of relatively low radial forces. In a known undercut anchor element of the aforementioned type (DE 195 20 130 Al) the base component identified there as an anchor sleeve has a relatively great longitudinal extent and the longitudinal slots forming the anchoring segments are guided a little further still beyond the groove and into the closed part of the anchor sleeve so that in the upper region extending beyond the circumferential groove they form individual aim portions which can be bent up under certain conditions, namely when during fitting the tightening head is drawn in by a predetermined additional amount into the anchoring segments. In this case the arm portions which are then expanded resiliently come to rest against the wall of the fixing bore and in turn exert radial spreading forces over a wide area there, but these are precisely the forces which should be avoided in the case of the undercut anchor elements under discussion here.
The object of the invention is to make further developments to the known undercut anchor element in such a way that it is ensured in every case that the anchor element is fitted with -3positive engagement in the appertaining fixing, i.e. the exertion of a radial spreading force on the wall of the bore in larger regions is reliably avoided.
Starting from an undercut anchor element of the type referred to in the introduction, this object is achieved according to the invention in that that the slots which form the anchoring segments in the base component extend from the end of the base component which is at the front in the fittihg direction as far as and into the region of the circumferential groove, that the tightening head is so dimensioned in its axial extent and conicity that the upper boundary surface of the annular projection facing the base component butts against the free ends of the anchoring segments in the positively engaged state of the anchor element and prevents spreading of the portions of the anchoring segments which form the first truncated cone beyond abutment against the wall of an appertaining fixing bore, and that the portions of the anchoring segments which adjoin the closed sleeve portion of the base component and taken together form a first truncated cone are longer than the portions of the anchoring segments which adjoin them and are at the front in the fitting direction and together form the second truncated cone, whereby the cone angle formed by generatrices of the outer boundary surface of the first truncated cone lying diametrically opposite in each case encloses an acute angle of less than 300, preferably less than 20', and the cone angle formed by generatrices of the outer boundary surface of the second truncated cone lying diametrically opposite encloses an obtuse angle of more than 1500, preferably more than 1600, and the generatrices of the boundary surfaces of the first and second truncated cone intersect at an angle in the range between 85" and 950, preferably substantially at right angles. In this way it is ensured that the locking segments can only be pivoted out by such an amount that, with the exception of the forces exerted by the cutting edges, they cannot exert any spreading force on the wall of the bore.
In this case the slots which form the anchoring segments in the base component advantageously extend from the end of the base component which is at the front in the fitting direction only as far as the groove side wall delimiting the circumferential groove or if this is necessary or advantageous for reasons related to production techniques only slightly beyond the groove side wall delimiting the circumferential groove at the rear end and into the AMENDED PAGE -4remaining closed portion of the sleeve portion of the base component. Thus this sleeve portion of the base component is largely closed all round and cannot expand radially even under the effect of high axial forces, so that it is ensured that the base component also cannot expand radially in its portion lying above the anchoring segments.
The invention is explained in greater detail in the following description of an embodiment in connection with the drawings, in which: Figure 1 shows a perspective exploded representation of an undercut anchor element according to the invention; Figure 2 shows a sectional view through the anchor element constructed in accordance with the invention according to Figure 1 in the starting position for fixing a component inserted in a fixing bore in a substrate before the fixing of the anchor element with positive engagement; Figure 3 shows the end portion of the anchor element of Figure 2 which is innermost in the bore in the fitting position obtained by tightening the nut provided on the outer end of the anchor bolt; and Figure 4 shows a partial view of the base component and the spacer sleeve of a modified embodiment of the undercut anchor element according to the invention in the perspective view corresponding to Figure 1.
The undercut anchor element which is illustrated in the drawings and is denoted in its entirety by 10 is composed of the components which are explained in detail below, namely an elongate anchor bolt 12, a tubular base component 16 disposed so as to be longitudinally displaceable on the cylindrical shank 14 of the anchor bolt, a spacer sleeve 18, a tightening head 24 which in the illustrated embodiment is screwed on a thread 20 of the anchor bolt 12 at the lower end in the drawing and is provided with a threaded bore 26 which widens conically from the shank 14 of the anchor bolt. On the end of the tightening head 24 which is innermost in the bore a circumferential annular projection 28 is provided which projects radially and is provided with a knurling on its circumferential surface and of which the upper radial boundary surface 28a facing the base component forms a stop surface, the function of which will be explained below. On its end region opposite the tightening head 24, the shank 14 is provided with a thread 30 over which a washer 34 can be pushed until it rests on the upper end of the spacer sleeve 18 and then a nut 36 can be screwed on. In a special case an axially compressible plastic ring 38 is disposed between the base component 16 and the spacer sleeve 18, the said ring being made from plastic and provided with radially projecting and tapered teeth offset relative to one another in the circumferential direction, and the said ring serves as first rotation-locking means during fitting of the undercut anchor element inserted into a fixing bore and because of its compressibility it makes a retightening route available which allows the nut 36 of the fitted anchor element 10 to be retightenable and so a component 32 mounted by means of the anchor element can be screwed onto the substrate in play-free abutment in any case.
On the end of the tubular component 16 which is at the front in the fitting direction a total of six anchoring segments 44 are formed in the illustrated case by longitudinal slots 40 cut in from the end face which is innermost in the bore and offset at uniform angular spacing over a part of the length of the base component, a circumfe'rential groove 42 being cut into the outer face of the said anchoring segments and spaced from the end which is at the front in the fitting direction, and this groove causes the anchoring segments 44 to be pivotable outwards whilst the material remaining in the base of the groove is deformed. In the illustrated case these longitudinal slots 40 extend as far as the upper boundary wall of the circumferential groove 42. If it is required for example for reasons related to production techniques the longitudinal slots can also be extended in the manner shown in Figure 4 a short way beyond the groove 42, but the extensions are kept so short that the portion of the base component located above the groove 42 also cannot expand in the region of the extended slots. In this way it is possible for the anchoring segments, which have been pushed until the front inner edges of the anchoring segments 44 butt against the circumferential surface of the tightening head 24, to spread by drawing in of the tightening head 24 into the base component and with further axial drawing in of the tightening head by turning of the nut 36 it is possible for the end regions of the anchoring segments to pivot up according to the 6conicity of the tightening head to such an extent that cutting edges formed on the outer face of their free ends cut into the material of the wall of a fixing bore 46 (Figures 2 and 3) in a substrate 48 into which the anchor element 16 is inserted, and these cutting edges then form an undercut in the fixing bore in this region. In Figure 2 the undercut anchor element according to the invention is shown inserted into such a fixing bore 46 but not yet in a fitted state, whereby the radially outer regions of the washer 34 disposed below the nut 36 are supported on the upper face of a component 32 to be fixed on a substrate 48, e.g. a concrete slab.
Figure 3 shows the fitted state in the bore 46 which is effected by the drawing in of the tightening head 24 into the base component 16. Since the ends of the anchoring segments which are innermost in the bore are pivoted up to a an external diameter measirement which is greater than the diameter of the fixing bore 46, the base component 16 and thus the anchor element 10 as a whole can only be withdrawn from the bore 46 by destroying the bore.
Forces acting in the direction of withdrawal, for example the forces acting in the shank 14 of the anchor bolt i2 from the nut 36 during clamping of the component 32 onto the substrate 48, attempt to draw the tightening head 24 further into the base component, as a result of which the end regions of the anchoring segments which are innermost in the bore are additionally pivoted in the sense of a radial expansion and the locking of the anchoring segments with positive engagement in the wall of the bore would be, so to speak, reinforced depending upon the tightening force introduced via the anchor bolt 12 or upon a load exerted by the fixed component 32 on the anchor bolt in the withdrawal direction. However, due to the radially projecting annular projection the tightening head 24 can only be drawn so far into the anchoring segments 44 until the boundary surface 28a of the annular projection comes to rest on the end surfaces of the anchoring segments 44, i.e. pivoting out of the anchoring segments beyond the amount shown in Figure 3 is not possible.
The anchoring segments 44 formed by the circumferential groove 42 in the base component have, when taken together, the shape of a double truncated cone which is discernible in Figures 1, 2 and 3, in which two truncated cone surfaces 44a, 44b which butt against one another with their end faces of smaller diameter form a circumferential necking in the outer -7surface of the anchoring segments. In this case the base 'surface of the truncated cone surface 44a which is at the front in the fitting direction and the base surface of the truncated cone surface 44b formed on the groove 42 each have a diameter which corresponds substantially to or is somewhat smaller than the external diameter of the base component 16. In particular the cutting edge formed on the circumference of the base surface of the truncated cone surface 44a should in this case have a somewhat smaller diameter than the base component 16. Inthis case the design is such that the truncated cone surfaces 44a formed on the end region of the anchoring segments 44 which is at the front in the fitting direction enclose an obtuse cone angle of more than 1500, preferably more than 1600, whilst the truncated cone surfaces or boundary surfaces 44b of the adjoining portion of the anchoring segments 44 have a cone angle of less than 300, preferably less than Due to the obtuse cone angle of the boundary surface 44a and the acute cone angle of the conical or boundary surface 44b, these boundary surfaces meet at an angle of approximately 900, and the outer edges of the truncated cone surface 44a form sharp-edged chisel-like cutting edges which during fitting of the anchor element are pivoted out from the retracted position in the fixing bore 46 as shown in Figure 2 into the position shown in Figure 3, in which they have penetrated the material of the wall of the bore and are anchored there with positive engagement. Forces directed radially outWards into the wall of the fixing bore only occur during the fitting operation in the immediate penetration zone of the cutting edges into the wall of the bore and, moreover, due to the sharp-edged construction of the chisel-like cutting edges these forces are relatively low.
From the comparison of Figures 2 and 3 it can also be seen that the radial boundary surface 28a, which in the initial state (Figure 2) is spaced below the free ends of the anchoring segments 44, has been drawn in the fitted state (Figure 3) until it rests on the ends of the anchoring segments which are then pivoted out. Therefore it is not possible for the locking segments 44 to pivot out any further. Thus the anchoring segments 44 are prevented from being pivoted out beyond the position shown in Figure 3 to such an extent that the truncated cone surfaces 44b come to rest on the wall of the fixing bore 46 and then with further pivoting out being able to exert radial spreading forces on the wall of the bore.
8 It can be seen that modifications and variants of the embodiment described can be made within the scope of the idea on which the invention is based. The tightening head 24, which in the described embodiment is a separate component screwed onto the thread 20 of the shank of the anchor element, can also be formed integrally on the shank 14 of the anchor element shank 12. Then the tightening head 24 can only be drawing into the base component 16 by screwing of the nut 36 onto the thread 30 at the upper end of the shank 14. On the other hand, a modification is also conceivable by which a screw head is formed integrally on the upper end of the shank of the anchor element instead of the nut screwed onto the thread Then it is necessary to construct the tightening head 24 as a separately produced component which is screwed onto the thread 20 in order to be able to draw the tightening head 24 into the base component 16.
Claims (3)
1. Undercut anchor element with an anchor bolt, the elongate cylindrical shank of which is provided on its end which is to the rear in the fitting direction with a fixing head or a nut screwed onto a thread and has on its end which is to the front in the fitting direction a tightening head which widens in the shape of a truncated cone with a radially projecting annular projection provided on its free end on which there is displaceably mounted a tubular base component which has multiple slots extending from its end which is at the front in the fitting direction and over a part of its length and forms a number of anchoring segments in the slotted region, the said base component having an internal diameter substantially equal to or somewhat greater than the external diameter of the cylindrical shank and having in its outer face a circumferential groove spaced from the end which is at the front in the fitting direction, wherein the said groove causes the end regions of the anchoring segments which are at the front in the fitting direction to be pivotable outwards whilst the material remaining in the base of the groove is deformed in such a way that in the state in which they are inserted into an appertaining fixing bore they are pivoted up by the introduction of a tensional force which displaces the anchor bolt and the base component relative to one another, whereby the anchoring segments taken together have the external shape of two truncated cone surfaces which abut one another with their end faces of smaller diameter and of which the base surfaces formed, on the one hand, on the end which is at the front in the fitting direction and, on the other hand, on the groove when they are not pivoted up each have a diameter which substantially corresponds to or is somewhat smaller than the external diameter of the base component, the truncated cone surface which is at the front in the fitting direction forming a cutting edge, wherein the slots which form the anchoring segments in the base component extend from the end of the base component which is at the front in the fitting direction as far as and into the region of the circumferential groove, that the tightening head is so dimensioned in its axial extent and conicity that the upper boundary surface of the annular projection facing the base component butts against the free ends of the anchoring segments in the positively engaged state of the anchor element and 10 prevents spreading of the portions of the anchoring segments which form the first truncated cone beyond abutment against the wall of an appertaining fixing bore, and the portions of the anchoring segments which adjoin the closed sleeve portion of the base component and taken together form a first truncated cone are longer than the portions of the anchoring segments which adjoin them and are at the front in the fitting direction and together form the second truncated cone, whereby the cone angle formed by generatrices of the outer boundary surface of the first truncated cone lying diametrically opposite in each case encloses an acute angle of less than 300, preferably less than 20', and the cone angle formed by generatrices of the outer boundary surface of the second truncated cone lying diametrically opposite encloses an obtuse angle of more than 1500, preferably more than 1600, and the generatrices of the boundary surfaces of the first and second truncated cone intersect at an angle in the range between 85' and 95, preferably substantially at right angles.
2. Undercut anchor element as claimed in Claim 1, wherein the slots which form the anchoring segments in the base component extend from the end of the base component which is at the front in the fitting direction as far as the groove side wall delimiting the circumferential groove at the rear end.
3. Undercut anchor element as claimed in Claim 1, wherein the slots which form the anchoring segments in the base component extend from the end of the base component which is at the front in the fitting direction slightly beyond the groove side wall delimiting the circumferential groove at the rear end. Dated: 13 September 2004 PHILLIPS ORMONDE FITZPATRICK Attorneys for: HEINRICH LIEBIG 964 lp
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10035580A DE10035580B4 (en) | 2000-07-21 | 2000-07-21 | Positive locking undercut anchor |
DE10035580.3 | 2000-07-21 | ||
PCT/EP2000/007367 WO2002008615A1 (en) | 2000-07-21 | 2000-07-31 | Undercut anchor element that can be mounted with positive engagement |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2002224561A1 AU2002224561A1 (en) | 2002-05-02 |
AU2002224561B2 true AU2002224561B2 (en) | 2004-10-21 |
Family
ID=7649763
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2002224561A Ceased AU2002224561B2 (en) | 2000-07-21 | 2000-07-31 | Undercut anchor element that can be mounted with positive engagement |
AU2456102A Pending AU2456102A (en) | 2000-07-21 | 2000-07-31 | Undercut anchor element that can be mounted with positive engagement |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2456102A Pending AU2456102A (en) | 2000-07-21 | 2000-07-31 | Undercut anchor element that can be mounted with positive engagement |
Country Status (5)
Country | Link |
---|---|
US (1) | US7150595B2 (en) |
EP (1) | EP1301719B1 (en) |
AU (2) | AU2002224561B2 (en) |
DE (1) | DE10035580B4 (en) |
WO (1) | WO2002008615A1 (en) |
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GB0306060D0 (en) * | 2003-03-17 | 2003-04-23 | Ricardo Consulting Eng | A fastening device |
US7357363B2 (en) * | 2003-12-30 | 2008-04-15 | Karl Guthrie | Expansion bolt |
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CA2136020A1 (en) * | 1993-03-17 | 1994-09-29 | Heinrich Liebig | Impact installable fastening |
DE19520130A1 (en) * | 1995-06-01 | 1996-12-05 | Heinrich Liebig | Form-fit undercut anchor |
US6012887A (en) * | 1997-12-20 | 2000-01-11 | Hilti Aktiengesellschaft | Undercut self-cutting anchor |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2033100A (en) * | 1932-10-20 | 1936-03-03 | Johns Manville | Structural assembly |
DE3731819A1 (en) * | 1987-09-22 | 1989-03-30 | Hilti Ag | SPREADING DOWEL |
GB9210235D0 (en) * | 1992-05-13 | 1992-07-01 | Emhart Inc | Anchor bolt |
DE4226011A1 (en) * | 1992-08-06 | 1994-02-10 | Fischer Artur Werke Gmbh | Impact expansion anchors for anchoring in a cylindrical borehole |
DE9303899U1 (en) * | 1993-03-17 | 1993-05-13 | Liebig, Heinrich, 6102 Pfungstadt | Impact-set expansion anchor |
AT403402B (en) * | 1995-11-06 | 1998-02-25 | Mark Rudolf | FASTENING ELEMENT |
DE19603265A1 (en) * | 1996-01-30 | 1997-07-31 | Hilti Ag | Expansion dowels |
DE19622544A1 (en) * | 1996-06-05 | 1997-12-11 | Hilti Ag | Undercut anchor |
DE19627774A1 (en) * | 1996-07-10 | 1998-01-15 | Hilti Ag | Self-tapping undercut anchor |
DE19709567A1 (en) * | 1997-03-08 | 1998-09-10 | Hilti Ag | Expansion anchor |
DE19744728A1 (en) * | 1997-10-10 | 1999-04-15 | Hilti Ag | Drive-in dowels |
DE19756997A1 (en) * | 1997-12-20 | 1999-06-24 | Hilti Ag | Undercut dowels |
-
2000
- 2000-07-21 DE DE10035580A patent/DE10035580B4/en not_active Expired - Fee Related
- 2000-07-31 EP EP00954579A patent/EP1301719B1/en not_active Expired - Lifetime
- 2000-07-31 US US10/333,527 patent/US7150595B2/en not_active Expired - Fee Related
- 2000-07-31 WO PCT/EP2000/007367 patent/WO2002008615A1/en active IP Right Grant
- 2000-07-31 AU AU2002224561A patent/AU2002224561B2/en not_active Ceased
- 2000-07-31 AU AU2456102A patent/AU2456102A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2136020A1 (en) * | 1993-03-17 | 1994-09-29 | Heinrich Liebig | Impact installable fastening |
DE19520130A1 (en) * | 1995-06-01 | 1996-12-05 | Heinrich Liebig | Form-fit undercut anchor |
US6012887A (en) * | 1997-12-20 | 2000-01-11 | Hilti Aktiengesellschaft | Undercut self-cutting anchor |
Also Published As
Publication number | Publication date |
---|---|
EP1301719A1 (en) | 2003-04-16 |
AU2456102A (en) | 2002-02-05 |
WO2002008615A1 (en) | 2002-01-31 |
US7150595B2 (en) | 2006-12-19 |
EP1301719B1 (en) | 2005-03-23 |
DE10035580B4 (en) | 2013-07-25 |
US20040253075A1 (en) | 2004-12-16 |
DE10035580A1 (en) | 2002-01-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK25 | Application lapsed reg. 22.2i(2) - failure to pay acceptance fee | ||
NB | Applications allowed - extensions of time section 223(2) |
Free format text: THE TIME IN WHICH TO PAY THE ACCEPTANCE FEE HAS BEEN EXTENDED TO 24 FEB 2005. |
|
FGA | Letters patent sealed or granted (standard patent) | ||
PC | Assignment registered |
Owner name: SIMPSON STRONG-TIE IRELAND LIMITED Free format text: FORMER OWNER WAS: LIEBIG, HEINRICH |
|
MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |